缓释铁对土壤中,和的同步稳定产生缓释铁的作用
Zhi Jiang1,2, HongZhen Ran3, Lin Yu2
1Zhongye Changtian International Engineering Co., Ltd., Changsha, 410205, Hunan, People's Republic of China.
Environmental geochemistry and health
|March 26, 2025
概括
零价值铁 (ZVI) 有效地稳定了被多种重金属如,和污染的土壤. 从球磨ZVI中缓慢释放的铁 (II) 通过形成更稳定的铁矿物质来增强这种稳定.
科学领域:
- 环境科学 环境科学
- 地质化学 地质化学
- 材料科学 材料科学 材料科学
背景情况:
- 被多种重金属 (Pb,Cd,As) 污染的土壤对环境构成重大风险.
- 零价值铁 (ZVI) 显示出由于铁的释放而导致重金属同时稳定的前景.
- 缓释Fe的特殊作用在稳定土壤中的Pb,Cd和As需要进一步研究.
研究的目的:
- 研究缓释Fe (II) 对污染土壤中Pb,Cd和As的同时稳定性的影响.
- 为了比较ZVI (Fe0) 和球磨ZVI (B-Fe0) 的稳定效率,具有不同的Fe (II) 释放率.
主要方法:
- 用ZVI (Fe0) 和球磨ZVI (B-Fe0) 污染的土壤的处理.
- 使用NaHCO3和DTPA提取方法分析重金属稳定效率.
- 规范分析以确定Pb,Cd和As化学形式的变化.
- 二次铁矿产形成的特征.
主要成果:
- 球磨ZVI (B-Fe0),具有增强的Fe(II) 释放,与ZVI (Fe0) 相比,显示出As,Pb和Cd的优越稳定性.
- 在56天后,B-Fe0治疗实现了As的72.52%稳定,Pb的43.63%和Cd的34.71%.
- 规范分析证实了Pb,Cd和As随着时间的推移转化为更稳定的形式.
- 观察到铁氧化物含量增加和无形铁 () 氧化物转化为晶体磁铁.
结论:
- 从ZVI材料中缓慢释放的铁是土壤中有效稳定多重金属的关键.
- 二级铁矿物质的形成,特别是磁铁,有效地使Pb,Cd和As无动于衷.
- 基于ZVI的材料,特别是那些具有增强Fe (II) 释放的材料,为污染土壤的整治提供了一个可行的策略.
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